Coffee maker



Nov. 2, 1937. F. E. woLcoTT COFFEE MAKER Original Filed Oct. 7, 1951 6 Sheets-Sheet 1 Nov. 2, 1937.

F. E. WOLCOTT COFFEE MAKER Original Filed Oct. '7, 1931 6 Sheets-Sheet 2 ATTORNEY.

Nov. 2, 1937. F. r; woLcoTT COFFEE MAKER Original Filed Oct. 7, 1931 6 Shee'ts-Sheet 5 ENT'OR .MZK ATTOR N EY.

Nov. 2, 1937. F. E WOLCOTT 2,097,681

COFFEE MAKER Original Filed Oct. '7, 193.1 6 Sheets-Sheet 4 av 4a ATTORNEY.

Nov. 2, 1937. F. E. WQLCQTT COFFEE MAKER 6 Sheets-Sheet 5 Original Filed 001'.. 7, 1931 ATTORNEY.

Nov. 2, 1937. F. E. woLcoT'r 2,097,681

COFFEE MAKER Original Filed Oct. 7, 1931 6 Shegts-Sheet 6 Patented Nov. 1937 y UNITED VSTATES PATENT ol-Flcs COFFEE MAKER Frank E. Wolcott, Welt Hartford, Conn., aaaignor, by menno alignments, to The Silex Company, a corporation of Connecticut (1938) Applicationoctober 7, mi. serai No. 501,453

Renewed April 13, 1936 84 Clllml. (Cl. 21S-48) My invention relates to coffee makers. means operable to permit the brewed codee to be It has among its objects to provide an imkept hot, and improved thermostatic means assoproved coil'ee maker, especially and more parciated with the dispensing receptacle for turning ticularly an improved coffee maker adapted for. oi! this heat automatically, as well as improved restaurant use and which is of the vacuum type resetting mechanism for the heat controlling 5 adapted to transfer the heated water in one reswitch, while all of the above mentioned mechaceptacle to the ground coiIee in another receptanism. is mounted and arranged in an improved cle and automatically return the brewed coifee to manner on an improved base. These and other the first mentioned receptacle from which it is objects and advantages of my improved vconstrucdispensed. Further objects of my invention are tion will, however, hereinafter more fully appear. 10 to provide such an improved coffee maker adapted In the accompanying drawings I have shown for to utilize glass, as distinguished from the metal purposes of illustration one embodiment whichmy urns now used, and accordingly minimize objecinvention may assume in practice. tionable avoring of the conce by contact with In these drawings,-

.metaL while also providing such a coffee maker Figure l is a side elevation of a complete coffee 15 wherein the steps in the whole coffee making maker constructed in accordance with this emoperation are visible in such manner as to transbodiment of my invention; form the coffee maker from .an unattractive purely Fig. 2 is a plan view of the same; utilitarian piece of equipment into an attractive Fig. 3 is a plan view with the bowls removed object of lively and continued interest to the resand portions of the base broken away to facilitate 20 taurant patrons. A still further object of my inillustration; vention is to provide an improved coffee maker of Fig. 4 is a vertical sectional view on line 4 4 this type provided with improved automatic con,- of Fig. 2, showing the heating and dispensing trolling means for insuring the exact timing of bowl in section, together with'the heating means the coffee making operation so that for a given and the supply and discharge connections at op- 25 amount of coffee and water, brewed coffee of exposite ends of the bowl; actly the same strength and quality may be ob- Fig. 5 is a vertical section on line I-l of Fig. 2. tained each and every time, all in such manner showing the coee containing or brewing bowl in as to minimize the present objectionable results section, with its supporting means and the switch obtained where an operator is required to use his actuating connections at one end thereof and the 30 own judgment and is frequently busy or forgetful. supply and discharge connections at the other Further objects of my invention are to provide end thereof; auch a coffee maker having improved controlling Fig. 6 is a bottom plan view of the heater conmechanism for the heating means operative autaining housing below the heatin and dispenstomatically after a predetermined contact of the ing bowl; 35 boiling water and the coffee to turn ofi the heat, Fig. 'l is a vertical sectional view of the structure and also improved co-operating controlling mechshown in Fig. 6, the view being taken on line 'l-'i anism operative thereafter to keep the brewed of Fig. 3; coffee hot while also being automatically opera- Fig. 8 is a detail view of the heating element, a

40 tive when the level of the brewed coffee in the disportion of the insulation on one of the radially 40 pensing bowl falls below a predetermined limit to disposed resistance carrying members being turn off the heat under the same. A still further broken away to expose the resistance wire; object of my invention is to provide an improved Fig. 9 is a detail sectional view on line 9 9 of coilee maker structure comprising an improved Fig. 8;

arrangement and construction of receptacles Fig. 10 is a sectional view on line il-II of Fig. 45

having an improved siphon connection and ar- 3 showing the mercury controlling switch and its ranged in an improved and attractive manner, connections; and having improved water supply and coffee dis- Fig. 11 Ls a perspective view showing the switch pensing connections to one of the receptacles, imcontrolling mechanism;

o proved heating means associated with the latter, Fig. l2 is a wiring diagram, and 50 improved connectionrwith the ground coffee con- Fig. 13 is a section on line -II of Fig. 4.

taining receptacle enabling the latter to be readily In this illustrative construction I have shown, removed and replaced, improved heat controlling generally speaking, a vacuum type coffee maker connections controlled by the weight of the liquid comprising an improved bowl I, which is the water in the latter receptacle, improved heat controlling yor heating and dispensing bowl, connectable by 55 means, and the base 4 also carries improved controlling and indicating mechanism as well as improved water supply and coffee dispensing connections for the bowl I, all hereinafter more iully described.

Referring more particularly to the bowl I and its supporting means, it will be noted that the salme is herein of glass and of an elongated oval shape, and provided at its lower end with a depending short axial inlet and discharge connection 5 and at its upper end with an enlarged neck or mouth 6. Moreover, it will be noted that the lower rounded end of this bowl above the portion 5 is seated in a concave seat member 3 on the base 4. As shown, this seat member 8, which herein is otherwise imperforate, also has an axial sleeve portion 9 therein through which the portion 5 extends, and also has a depending ange I3 enclosing an upstanding annular portion II on one side of the top member I2 of the base 4 in such manner as to provide an adequate stationary support for the bowl in the vertical position of the latter illustrated, while providing a housing for the bowl heating means, hereinafter described, between the members 8 and II. As shown, the member 8 is also locked on, while being removable at will, by a series of bayonet slots I0' in the flange ill and a series of pins I0" carried on the member il.

operatively connected to the portion 5 at the bottom of this bowl are improved water supply and coiee dispensing connections. The same herein are carried by the base 4, and include a water supply pipe I3 and a brewed coiee dispensing spigot or faucet I4. Of these, the water supply pipe I3 extends vertically up through the bottom I5 of the base 4 and is adapted to supply water to the bowl I whenever desired, while the dispensing spigot I4 extends laterally from and through a front wall I6 of the base and is adapted to draw oi the brewed coffee from the bowl I at any time afterthe completion of the coiee making operation.

Referring more particularly to the water supply connections, it will be noted that the water supply pipe I3 opens directly into the portion .5 on the bowl i, while the :dow through the pipe I3 is controlled by a suitable controlling valve Iloperable by a controlling member I8 on the front wall I3 of the base. As shown, the portion 5 on the bottom of the bowl extends into a connecting member i9 having supporting arms 20, supported by the top of the base 4. Herein, this ,member I9 also has a passage leading from the valve I,'| and opening into an enlarged passage 2| into which the portion 5 extends, while a suitable packing 22 engages the outside of the portion 5 slightly above its lower end to seal the connection. This packing 22 is also preferably held in place by a suitable packing adjusting gland 23 through which the portion 5 extends amally below the opening 3 in the member 8, while the gland 23 is also preferably spaced from contact with the portion 5 of the glass bowl as shown. Thus it will be evident that when it is desired to supply water to the bowl i, it is only necessary to open the valve Il by its control member I8 and close the same when the water level in the bowl has reached any selected one of a series of diierent level indications or graduations 2'4, herein three, near the top of the bowl, Fig. 1.

As regards the dispensing connections, it will also be noted that the member I9 has a laterally opening aperture 25 above its connection to the valve I'I and communicating with a pipe 26 which leads from the member i3 to the front wall I6 ofthe base at a point near the top of the latter and between and below the bowls I and 3, where it is connected through suitable connecting means 21 to the dispensing spigot or faucet I4 heretofore referred to. Thus it will be evident that when it -is desired to dispense brewed coffee from the bowl i, after, of course, the valve i1 has been closed by its controlling member I8 to shut o3 the supply of water, it is only necessary to open the faucet i4 to draw of! coffee as desired from the bowl I into any cup or other receptacle disposed beneath the faucet.

Operatively associated with the upper end of the bowl I is improved means for sealing the same and improved means for transferring heated water from the bowl I to the bowl 3 and returning the brewed coilee to the former bowl. Herein, it will be noted that the ilrst means includes removable connections 30, 3|, adapted to be clamped on the upper end of the bowl I, while the transfer connections include a vertically disposed pipe 33 preferably of glass and carried by the member 30 and having a suitable sealed connection therewith, while also communicating with the glass connection, generally indicated at 2, which is in turn connected to the bowl 3.

Referring more particularly to the members 30', 3| and their mounting on the bowl top, it will be noted that the top of the bowl is herein provided with a lateral ange 34 and that packing members 35 and 36 carried by the members30, 3|, as hereinafter described, .engage this ilange. More particularly, it will benoted that the top member 3D herein hasV a generally convex or crowned top and that it is apertured to permit the insertion and removal of the member 33. Herein, it also has an annular packing containing groove 31 and a depending inner flange 33 adapted to enter into the open end 3 of the bowl and engage the inside of the flanged top thereof. and also another outer depending portion 39 adapted to pass down below the top of the ange 34 on the latter. It will also be observed that this member 30 has a wider annular passage 40 inside y the depending member 38 and that a petcock 4I is carried on the top surface of the memberV 30 and connected through a port 42 with this annular passage, while the member 30 is also provided with an elongated depending packing housingsleeve 43 coaxial with the member 33 and through which the latter extends as hereinafter described. As shown, the member 3| is of two piece construction and disposed beneath the member 30 and spaced laterally out of contact with the upper portion or neck of the bowl I. Herein it also includes a depending shield 44, forming a continuation of the crowned top of the member 30 and extending down from the packing 36, and this shield 44 is apertured laterally and has the bifurcated projections 45 on the member 3| projecting through opposite sides of the same. Also, as shown, these projections 45 carry pivoted between them threaded locking members 46 which in turn are receivable in corresponding slots 4l in corresponding superimposed projections 'S8 on the member 30 and sealed by the members II, II and the packings II, II when the clamps are in position, while the pressure in the bowl may be determined by suitable adjustment of the petcoek II, as hereinafter described.

Referring more particularly to the pipe II and its seals and connections, it will'be noted that this pipe is slidably mounted in a packing or seal in the portion II on the member II and extends down into the bowl to a point substantially opposite the top of the concave seating member I. It will also be noted that it extends up out through the packing holding member II, and that a suitable packing II seated in this member II acts to seal the pipe II in position in the portion II, the pressure of the packing being adjusted as desired by a packing gland II threaded in the upper end of the member II. As shown, the pipe II is also provided with an enlarged portion II on its upper end and has a packing member I2 seated therein and sealing this connection between the member II and a connecting member forming a part of the siphon connection and herein indicated at 2. Thus it will be evident that the members 2 and II may be readily disconnected at will and the member II may be both bodily withdrawn from the bowl with the member II and separated from the latter. It will abo be evident that* when water in the bowl I is brought to a boil, and the pe'tcock Il in the member II is then closed, the steam will generate pressure in the top of the sealed bowl I forcing the water in the latter up through the pipe II and laterally through the connecting pipe I to the bowl I to which it is supplied. through connections hereinafter described.

Referring next to the bowl I and its connections to the bowl I, it will ilrst be noted that the bowl is also of glass and is substantially the same shape I as the bowl I and provided with a corresponding flanged open upper end or neck portion II, and a correspondingly rounded lower end II. Here, however, instead of a bottom inlet and outlet connection corresponding to the connection I on the bowl I, this portion is provided with a closed bottom 51. Here it will also be observed that a tube II, preferably also of glass, is extended axlally down into the bowl I to a point adjacent the bottom thereof. 'Ihis tube. like the tube II, is also provided with an enlarged upper end II carrying therein a packing II corresponding to the packing 52 and adapted to receive the opposite end of the connection 2. Here, however, this member II is preferably provided with a flared lower end or enlarged mouth Il. Thus it will be evident that when this bowl I with ground coffee in the latter, is, suitably supported on the base I. as hereinafter described, and the member II is suitably supported as likewise hereinafter described, the bowl is adapted to receive the boiling water from the bowl I through the connection 2 and the member I, while subsequently, when the bowl i is cooled sumciently to create a'vacuum condition therein, the member II will act as a return means returning the brewed eoil'ee fromvthe bowl I through the connection 2 to the bowl I to be dispensed.

Associated with the bowl I are improved supporting means can'ied by the base I. These herein include a concave seat member II, generally corresponding to the member I previously described, and having a aange II overlapping a member Il, generally corresponding to the member Il, and similarly carried on the top member I2 oi the base I, but at the opposite end of the latter from the member II and spaced laterally from the latter. Here, however, it will be noted that the member Il, instead of having an axial aperture therein, has a closed bottom II. Moreover, it will be noted that the manga II has vertical slots II therein receiving laterally pins or screws I1 on the member Il, and adapted to permit the bowl I and its supporting member I2 to be moved vertically within the limits of the slot relative to the member Il, while also permitting locking on and removal of the member I2 through bayonet slots II' also cooperating with the pins I1. It will also be noted that a coiled spring II is disposed beneath the member II around the bottom II thereof, and that this spring acts as a resilient support for the member I2 and has its opposite end supported on a depending cup member II. As shown, this latter member extends down through an aperture 1I in the top I2 of the base, coaxial with the bottom of the bowl and the spring, and has an overturned supporting flange 1I on its upper end resting on the upper surface of the top i2 around the apertures 1I. weight of water has been supplied to the bowl I, the latter will automatically move downward to compress the spring II within the limits established by the slots Il and also actuate improved heat controlling mechanism for the bowl I hereinafter described. Similarly, when the weight or the liquid in the bowl a has been decreased by the return of the same to the bowl I, it will be evident that the bowl I will automatically move upward to resume its normal up position, in which it is held by the spring II.

In view of this vertical movement of the bowl I, improved carrying or mounting means for the member II are provided. These herein include a standard of any suitable type, as, for example, a rod 'I2 carried on a bracket 1I attached to the back 1I of the base 4 and also carrying at its upper end a bracket 'II carrying guiding and positioning means associated with the upper end of the bowl I and the member II.

Herein the latter means include a depending` shield 1I, generally similar in contour to the shield II previously described, and attachedA at l1 to the bracket 1I. Asl shown, this shield is provided with an axial aperture 1I and a depression above the same presenting a peripheral flange 'II surrounding the member II. 'Ihis flange in turn is seated on the upper anged end of the bowl neck 5I, and itself provides a seat for an annular member Il having a sexies of apertures or perforations ll therein providing communication between the inside of the bowl I and the atmosphere. As shown, this member II is also provided with an axial aperture I2 surrounding the member II and spaced therefrom in such manner as to adapt it to use with various different members II despite the variations in the size thereof usual in glass manufacture. Moreover, it will be noted -that another annular member II smaller in outside diameter than the member II is supported thereon in such manner as to overlie the axial aperture I2 therein, while exposing the atmospheric connections or perforations II. This member II, it will also be noted, is a split spring member and snugly engages the member II in such manner as to provide a support for the same and that end of the member 'Ihus it will be evident that when a given 2. Thus xt willbe observed that, while the bowl 3 is free to move vertically, as previously de scribed, the member 89 is supported at all times by the connections described, while the inside of the bowl is at all times in communication with the atmosphere. Also it will be evident that whenever desired. the bowl 3 may be readily removed.

The mechanism so far described may be heated by various heating means, but I preferably provide improved electrical heating means therefor disposed below the bowl l, and also preferably provide improved controlling means for these heating meansassociated withthe bowl 8 and controlled by the latter as it moves vertically, as previously described.

Referring rst to the heating means i'cr the bowl I, it will be noted that these include a series of radially disposed resistance elements 85 carrying resistance Wires 86 and enclosed in mica strips 81. As shown in the plan View in Figure 8, each of these elements 85 is provided with a curved outer edge and has its sides tapering toward a common axis, but it is cut oi at its inner end short of the axis and there connected between a. pair of connecting rings 88 by any suitable means, as, for example, rivets 89. Thus, it will be noted that the several elements are spaced apart by V-shaped spaces 85a widening toward the periphery of the heating unit, formed' by the combined and connected elements. Thus, it will be noted that a unitary structure is provided having flexible radially extending elements 85 adapted to conform to the bottom o! the member 8.

As regards the mounting of this unit, it will be noted that the rings 88 are herein disposed around the depending axial portion providing the opening 9 in the member 8, and that the several elements 85 are pressed against the lower surface of the member 8 by a pressure plate 90 carrying terminals 9|., 92, 93, 94, 95 and 96, for certain heating elements, as hereinafter described. Moreover, lt will be noted that a heat retaining plate 91 is substantially spaced below the pressure plate 90 in such manner as to provide an effective heat loss preventing chamber 98 between itself and the plate 90. This plate 91, in turn, carries insulated eyelets 99 insulated therefrom by suitable mica washers |00, which also provide apertures throughwhich the terminals 9| to 95 extend. Herein also it will be observed th'at this plate 91 is concave and has its upper periphery engageable with the upper edge of the pressure plate 90, while the plate 91 is also provided with an axial aperture |02 disposed coaxially around the depending axial portion 9 of the member 8 and is held in place by a bent up ange |08 on the bottom of the portion 9. Here attention is also directed to the fact that the member 8 is supported on a series of spaced upstanding members |04, herein three. which project up between the member 8 and its flange l and are carried on and attached to the upper end of the member I, all in such manner as to provide a rigid and effective heating construction when the parts are associated as described, the heating elements 85 being pressed firmly against the bottom of the member 8 on which the bottom of the bowl is seated, while the members |04 cut down the possible heat flow from the bowl to a minimum and the member 91 and chamber 98 tend to prevent loss of heat below the heating elements.

attention here is also directed to me fact um;

asomar the bowl i after the current has been turned of! in such manner as to expedite the automatic return of the brewed coffee from the bowl- 3 to the bowl i and automatically eitect this return after a normal infusion period, thereby automatically correctly timing the' infusion. This action is further expedited and discoloration ot the member il by excessive heat also minimized by the provision of a series of apertures extendin g around the member l I, while a similar series of apertures |05 is also provided i the member 94 to prevent discolorationK thereof. It will also be noted that the members 9, 9, 85, 90 and 91 all form a single assembly adapted to be inserted 'in the member ll and locked in place by the bayonet connections l0', l0".

Referring more in detail to the quick cooling structure provided, it will be observed that the same is such as to enable the desired normal infusion to be obtained without substantial upward air how through the base acting upon the bottom of the bowl l, and also one wherein, when ,this bowl is being heated cr cooled, there can be no air flow which also passes up from the base through the heating unit and acts directly upon the bottom of the bowl, as taught by the prior art. Instead, with such an air ilow impossible in view oi the member 8, improved means are provided for lowering the temperature of the bowl l within the desired time limits usual in this art, by providing an improved heat radiating or dissipating structure with the resistance element and making it possible to set up a wholly new cooling air dow which acts on this new radiating sti'ucture in such manner as thereby to bring down the temperature of the'bowl I sufficiently to insure the return of the brewed coffee to the bowl l within the desired time limits of a normal infusion. Here it will be observed that the heating means is such as to minimize heat storage and also enable the heating means to be very quickly brought up to heat following the initiation o! current ow and also very quickly cooled following the cessation of current flow. In connection with this quick cooling, note also that the' heat retaining member 91 of the heating assembly provides -eiiective heat radiating means ci relatively large area beneath the bowl and so associated with the resistance as to expedite cooling. Moreover, attention is directed to the provision of improved means for maintaining this heat radiating member in constant communication with the atmosphere so that, despite the fact that no suilcient ilow of cooling air to eiect quick cooling can be delivered upward through the casing d and through the heating means directly on to the bottom of the bowl l, quick cooling is still made possible .by an induced how of cooling air flowing through a new path and in sulcient quantity to take away the heat radiated by the resistance element and its supporting means within the desired time limits. Herein, these means include a series ot apertures |05 in the casing member which constantly communicate with the atmosphere and thus enable the heat from the heating means to be quickly dissipated from the member 91 following cessation of current ow. Further, it will be observed that the top member l2 of the base l is out away around and beneath the member 91 at |05a in such manner as to provide free communication with the interior of the basel. Ii' desired, the

,oemsi I stantial cooling air ilow around and through the I heating unit. to obtain' the desired Quick heating and cooling results, with the latter obtained by radiation from a part associated with the resistance clement and so located relative to the means preventing theupward cooling air flow `through the. unit, herein below said means, Vas

to enable a'new and substantial induced ilow of cooling air to be set up which takes away the heat radiated by the heating element so rapidly as to etlect cooling of the bowl I within the desired infusion limits. Further, it will be noted that herein this new induced cooling air now is also incapable of being interrupted even when the bowl is seated directly on the supporting surface oi' the heating assembly. In tact. even with the member l and the bowl l clodng o!! all upward ilow through the heating unit. it will be observed that quick heating and cooling within the usual time limits is obtainable.

In connection with the electric terminal connections for the heating unit, it will be noted that while the same may obviously assume diderent forms, in Fig. 6 the terminals 3| to 3l are disposed in pairs on adjacent elements Il with a nonterminal connected or inside element between each oi' these pairs. Further, it will be noted that the elements 33 are connected in three series of three elements each with the elements in each series connected in series (see Fig. 12), and the terminals located below the two outside elements of each series of three elements. Thus each terminal has a conductor leading away therefrom and is also connected to the adjacent resistance element, while the current ilows in series through the latter element and the next two adjacent elements and out through the cooperating terminal which is similarly connected to its adjacent element and also has a conductor leading away with the other conductor mentioned, through circuit connections, hereinafter described, to the controlling devices including manually adjustable three heat switch, generally indicated at |00 and an automatically operated switch |01, both also hereinafter more specifically described.

Referring more particularly to the terminal construction, it will be noted that the pressure plate nas a series of protruding and apertured flange portions |09 therein, preferably at dii.'- Ierent distances from its axis as shown in Fig. 6 and also suitably insulated by inner and outer insulating washers ||0. Moreover, it will be noted that in each instance the head of a threaded plug ||2 presses the inner one of these washers ||0 against one side oi' the ilange on the portion |09 while the threaded portion of the plug extends axially through the ilange out of contact therewith. Herein, another washer ||3 is disposed outside the outside mica washer ||0 while a threaded member ||4 is disposed outside this washer ||3 and threaded on the plug ||2. Moreover, it will be noted that the threaded member ||2 is provided with a longitudinally extending groove H5 extending ,longitudinally of the inner end of its threaded portion and its head, which is adapted to provide a passage for the end of the resistance wire 30. Here it will also be noted that an internally threaded member ||6 is threaded on the outer extremity of the member ||2 and clamps the end of the resistance wire 08 between its own inner end and the member ||4.- while this member H3 is also provided with an externally threaded outer extremity ||1 forming a bindingscrew and carrying a nut i I3 for clamping thereto the conductor leading away to the controlling devices. Thus it will be evident that at the same time that the latter conductors may be readily connected to each of the terminals, and each terminal is insulated from the member 31 by its projection through an insulating eyelet 00, each terminal is both conveniently and eilectively connected to its adjacent resistance element.

Herein each series of heating elements is connected to the line conductors |23, |2| through the medium oi' an improved circuit arrangement, hereinafter described, including the controlling switch |08, while current ilow from the line is established by a plug |22 carried on the back of the base 4 and connected through conductors |23 and |24 to the terminals |25 and |23 o! the switch |33, and iiow through the conductor |23 to the switch |00 is also controlled by the automatically operated switch |01, which is in turn controlled by the downward movement of the bowl 3 previously described.

Referring more particularly to the automatically operated switch |01, it will be noted that this switch |01, while not limited thereto. is herein in the form of a mercury switch and mounted for tilting to make or break the circuit therethrough while operative connections are provided between the switch and bowl 3 to tilt the switch and break the circiut whenever the bowl 3, as a result of a predetermined weight of heated liquid therein, depresses the spring 08 3 and assumes its bottom position relative to its support 04. As shown, the switch |01 has its terminals connected through flexible leads |30 and |3| to terminals |32, |33 in such manner as to form a series connection with the conductor |23. Also, it will be noted that the terminals |32, |33 are carried on a stationary depending insulating member |34 attached to the under side of the cover |2 o! the base 4 at a point substantially midway between the ends of the latter, and herein between the spigot |4 and the Spring 38. As shown, the switch |01 is also carried in a pivotally mounted clip |33 and has its depending terminals straddling a ilattened portion |36 on a control rod |31 extending longitudinally oi.' the base and suitably journaled in the member |34 and in supports |33 and |33, the arrangement being such that when the parts are in the position shown in Figure 11, current ilow is established through the switch |01 and through the switch |03 to the heating unit, while when the rod |31 is rotated, the switch is tilted to interrupt current ilow. Herein, it will also be noted that the rod |31 carries a laterally extending arm |40 having a slot |4| therein adapted to receive the lower end of a vertically disposed controlling member |42, while the arm is also adapted to be engaged by a projection, herein in the form of nuts |43 on the member |42, and be depressed thereby to rock the rod |31 and Open the switch circuit whenever the rod |42 is depressed to the required extent. It will be noted that herein the upper end of the rod |42 is suitably connected to move vertically with a plate |44 which is in turn attached to the bottom 0I of the vertically movable bowl seating member 02 i'or the bowl 3. Thus, it will be evident that when a predetermined weight of liquid has been transferred from the bowl to the bowl 3, i. e., suillcient to cause the spring Ol to be compressed my invention. 'Ihus a speclc description oi.' the switch structure per se seems unnecessary herein.

It should. however, be noted that the switch herein includes a rotatable actuating andindicating member |50 movable from on position successively into low, medium and high heat positions, indicated in Figures Al and 12, and that the switch controls the current ow through con- -ments 35.

such manner that the member |50 controls the current ow through all of the resistance ele- Thus, with the three elements 85' comprising the group a in Fig. 12 connected to the conductors |5| and |53,the three comprising the'group b connected to the conductors |52 and |53, and the three comprising the group c connected/to the conductors |54 and |55, when the member |50 is in its low position, all of the three series, a, b an'd c, are connected in series and each equally heated to a. low heat, while when the member |50 is moved to its medium position, two of the same are connected in parallel and brought to the same higher or medium heat, and when the member |50 is movd to its high position, all of the same are4 connectedl in parallel and brought to the same high heat. Attention'is also directed to the fact that the switch |50 is conveniently carried on the front member. |6 of the base 4 at a point below the bowl 3. Here, it will also be noted that a signal light |56, connected between the conductors |55 and |52, is also carried in a suitable housing disposed on and within the base l, herein beneath the water valve control member i8 and behind a suitable lens, as, for example, a red lens |51, making the lighted lamp visible from the outside of the base. Thus it will be evident that whenever the switch |01 is closed, through the switch |06 and by adjustment of its control member |50, the heat supplied to the bowl l may be regulated as desired, While the light |56 will always show when the heat is on and also indicate, by its glow, what heat is being used.

Cio-operating with the mechanism for auto,

matically operatingvthe mercury switch |01 is also improved manually operable resetting mechanism for that switch which it is necessary to operate before the switch |06 can be used to enable the heating elements 85 to keep 'the brewed coiee hot in the bowl and ready to be dispensed. Herein this mechanism includes a resetting member |60 operable from the front of the base 4 ,and reciprocable horizontally through the front wall I6l of the base 6 at a point behind the top of the spigot 14. As shown, this member or rod |60 is supported near its inner end in a bracket |6| depending from the top of the base 4 and also has a coiled spring |62 operating between this bracket and a washerand pin connection |63 on the rod, in such manner as normally to cause the member |60 to assume an outwardly projected or inoperative position. Further, it will be noted that the rod |31 also cari-les an upstanding projection |64 thereon oi various forms, and the switch construction per se is not a part or in such manner as to tilt the rod |31 and switch |01-back into a position re-establishing current ow through the switch |01.. It will be evident that during the'coil'ee making operation and .so long as the predetermined weight of liquid remains in-the bowl -3, pushing in of this reset member |60 will Vbe ine'ective. However, as soon as the brewed coiee in the bowl 3 has re turned to the bowl it will be evident that a momentary pushing in of the resetting member |60 will be suicient to reset the switch |01 by tilting the same back into 'circuit' closing position, while the rod |60' will be automatically returned' by its spring to its normally projecting position. Thus obviously after the switch -|01` has been thus reset after'the return of the Operatively associated with the controlling n safety mechanism for preventing damage when the brewed co'ee level in the bowl falls below a predetermined point. 'This point may, of course, Y vary, but herein it is the top of the ilange I0 on the bowl seat member 6. -More particularly, it will be noted that a thermostatic member |65 of any usual bimetallic construction is suitably attached, as at |66, to the under side of the pressure plate 90 above the rod |31. Moreover, it will be noted that this thermostatic member A|65 extends downward through a suitable slot |61 in the heat retaining plate 91, and further extends down past the rod |31 to a point below the same. Attention is also directed to the fact that a depending arm v|68 is provided on the rod 31 at a point betweenthebracket |6| and the end support |39, and that this arm |66 carries an adjustable screw |69 adjustable laterally relative to the lower extremity of the thermostatic member |65 so that the operation of the latter -may be adjusted for the desired temperature.

|60, the switch |06 will be inoperative, while the light |56 will also be out.

, In the operation of my improved construction it will be evident that if a given amount of coffee, as, for example, a pound of the same, is in the bowl 3, and a given amount of water is in the bowl l, exactly the same vresults will be obtained each time the coii'ee is made, through the automatic controlling means described, while the device will also 'be protected fromdamage by the co-operating automatic safety means described. Considering the operation more speclcally, it will be understood that in the beginning of the coffee making operation, the ground coiee, for example, a. pound, 'is preferably inserted in the bowl 3 before the same is mounted in the device. To increase convenience, two bowls 3 are provided for each .device so that, after each coee making operation, the bowl containing the grounds may be removed and the other containing .the fresh coiee may be substituted therefor.

mechanism and the switch |01 is'also improved The desired filling of the bowl I with water will also obviouslybe readily effected by adiustmentl of the controlling member I0, the petcock 4| then being open, while the height of the water in the bowl I will depend upon the requirements of the trade of the particular restaurant, the water level coming up to one or another of the graduations 20, as desired. With the switch |01 in closed circuit position, the actuating member of the switch |00 will then be moved to supply the desired amount of heat to the heating elements 00. Until the water in the bowl comes to a boil, the petcock 0I is preferably left open to prevent premature transfer of some of the water while the latter is at a lower than boiling temperature and accordingly calculated to produce inferior coffee. When this petcock is closed, the steam 'generated in the bowl I will act upon the boiling water therein to force the same successively through the connections 00, 2 and l0 over the ground coffee in the bowl 0. This operation will continue until the weight of the water in the bowl 0 is suillcient to compress the spring 00 and lower the control rod |42 which will then depress the arm |40 to tilt the rod |01 and the switch |01 to break the circuit to the heating unit. Thereafter, when, after a normal infusion period, the bowl I and its associated parts have cooled sufficiently, a vacuum condition will be created in that bowl and the brewed coi'fee in the bowl 0 being subject to atmospheric pressure, will be returned automatically to the bowl I through the connections 00, 2 and I3. Thus after the closure of the petcock 0I, the operation is entirely automatic, the heat being automatically turned oi! and the brewed coffee being not only automatically returned to the dispensing bowl, but so automatically returned after a normal infusion period.

After the completion of the coffee making operation as aforesaid, upon merely breaking the seal for the tube 2, the coffee will be ready to be dispensed from the faucet I0. If desired, I may pull the tube 2 out of the seal 00 and leave the parts in that position or bodily remove the tube Z and the member l0 at this time and leave them off during dispensing. If it is desired to keep the brewed coii'ee hot, it will also be evident that this may be accomplished by operating the resetting member |00 and setting the actuating member of the switch |01 in the'desired heating position. When the brewed coffee in the bowl I has been dispensed down to the level of the top of the ange i0, it will also be noted that through the thermostatic member |00, which is set to operate when the pressure plate approaches a dangerous temperature, and the connections |00 and |00,

co-operating with this member |00, the switch l 01 will again automatically be moved to open circuit position in such manner as to prevent the damage which might otherwise result from continuing to heat the bowl I when the same is empty or has only a very small quantity of coffee therein. Here it will also be noted that whenever the switch |01 has been operated automatically to interrupt the current supply to the heating unit by means associated with either bowl, it is necessary to reset the switch |01 by operating the member |65 before the heat can again be turned on by operating the actuating member |00 of the switch |06. Oi' course,` whenever the switches |00 and |01 are closed, the light |50 will also be on.

As a result of my improved construction itwill also be noted that the mechanism is very convenient in use not only as regards the supply of water thereto and the drawing offof the brewed coffee, but also as regards cleansing, it being possible to rinse the bowl I at any time by simply passing water into the same and withdrawing the rinse water through the faucet. The brewing bowl 0 will, of course, also be cleansed before being refilled with fresh coffee and returned to the device. It is also possible for the whole device to be taken down and cleansed whenever desired, the member I and the bowls I and 0 and their connections 00 and 00 all being readily separable. It will also be evident that the seals for the tube 2 in addition to being eifective during coffee making and regardless of the vertical positions of the bowl 0, may be very readily and quickly broken or connected as desired. On the other hand, the seal for the member 30 will not require removal save during brushing out the bowl and then the member 30 can be readily removed. Attention is also directed to the ready accessibility of all parts within the base upon the removal of the seating members 0 and 62 and the parts below the same, the heating assembly being removable as a unit with the member 0 and the member 00 being free to be lifted out when the member 02 is removed. Practically all of the parts in contact with the coifee being glass, the quality of the coffee is also high, objectionable flavoring of the coffee by metal being thereby minimized. A further advantage, arising both from the arrangement and the use of glass, is that the various steps of the process are so visible as to constitute a continuous source of interest to patrons. These and other advantages of my improved construction will, however, be clearly apparent to those skilled in the art.

While I have in this application specifically described one embodiment which my invention may assume in practice, it will be understood that the same is shown for purposes of illustration, and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and Letters Patent is:-

1. 'Ihe combination with a coffee maker comprising operatively interconnected water and coffee bowls, of heating means for said water bowl, means for automatically interrupting heating after a predetermined transfer of water from said water bowl to said coil'ee bowl, and means for automatically terminating infusion in the coffee bowl and effecting the return of the brewed coffee to the water bowl after a normal infusion period.

2. The combination with a coiee maker comprising operatively interconnected water and coiiee bowls, of electric heating means for said water bowl, means for automatically interrupting current flow through said heating means after a predetermined transfer of water from said water bowl to said coifee bowl, and stationary means for automatically terminating infusion in said coffee bowl and effecting the return of the brewed coffee to the water bowl after a normal infusion period.

3. The combination with a vacuum type coffee maker comprising operatively interconnected water and vcoffee bowls including a stationary water bowl, of electric heating means for said water bowl, means for automatically interrupting current flow through, said heating means after a predetermined transfer of water from said water bowl to said coffee bowl, and stationdesire to secure by f ary means for automatically returning the brewed coilee from said coifee bowl to said water bowl after a normal infusion period while the latter bowl remains upon said heating means.

4. The combination with a vacuum type coifee `maker comprising operativelyv interconnected water and coffee bowls including a stationary water bowl, of electric heating means for said water bowl, and means for automatically interrupting current dow through Asaid heating means after a predetermined transfer of water from said water bowl to said coilee b'owl, said electric heating means having means for eilecting cooling of said bowl within the limits of a normal infusion coiee to said water bowl, and watersupply and brewed coiee discharge connections for water bowl.

'1. The combination with a vacuum type cones maker having operatively inter-connected water said ' and coilee bowls, of electric heating means for said water bowl adapted to eiect liquid now from the latter to eect infusion in said coffee bowl, means for automatically interrupting current ow through said heating means when the liquid in the water bowl has been transferred to the coffee bowl for infusion in the latter, and means for eecting cooling of said water bowl suficiently quickly to effect the automatic return to said bowl of the brewed coee when the same has brewed for a normal infusion period in said codice bowl.

8. The combination with a vacuum type coiee maker having operatively inter-connected. water and coiiee bowls, of electric heating means for said water bowl, means for automatically inter- A rupting current ow through said heating means when the water inV said water bowl has been transferred to said coffee bowl to infuse the coffee therein, means for automatically enecting the return of the brewed coiee from said coifee bowl to said water bowl upon the completion of a normal infusion in the latter, and water supply and brewed coffee discharge connections having a common connection to said water bowl.

9. In combination, a vacuum type coffee maker comprising operatively connected coiee and water bowls, heating means Vfor the water bowl, a support for said heating means having a closure below said heating means for excluding substantial air flow up through the latter, and means aooaeai Y A for automatically eifecting the return of brewed coifee from said coiee bowl to said water bowl within the limits of a normal infusion following cessation of flow of heating medium to said heat- -ingmeans. Y v

10. In combination, a vacuum type coffee maker v comprising operatively connected coee and water bowls, electric heating means Vfor the water bowl, a support for said heating vmeans having` to said water bowl within the limits oi a normal infusion following cessation of current iiow to said heating means.

11. In combination, maker comprising operatively connected` coil'ee and water bowls, electric heating means for the I water bowl, a support for said heating means having av closure below said heating means for excluding substantial air ilow up through said closure and heating means to said bowl, and means associated with said heating means and support for automatically effecting the return .of brewed coiiee from said coffee bowl to said water bowl within the limits of a normal infusion following cessation of current flow to said heating means.

12. The combination with a vacuum type coffee -maker comprising operatively connected coffee and water bowls, heating means for said water bowl, and a support for said heating means having a closure below said bowl for inhibiting al substantial induced cooling air flow up through said heating means, of radiation accelerating means associated with said heatingv means and beneath said water bowl for eiecting the automatic return ofbrewed coffee from said coffee bowl to said water bowl within the limits of a normal infusion following the cessation of iiow of heating medium to said heating means.

i3. The combination with a vacuum type coiee maker comprising operatively connected coee and water bowls, electric heating means for said water bowl, and a support for said heating means having a closure below said bowl for inhibiting a substantial induced air iiow up through said heating means, of radiation accelerating means associated with said heating means and beneath mid water bowl, and means providing during cooling a coolingfiow o'f atmospheric air over said accelerating means and cooperating there with to' effect the automatic return of brewed coffee from said coii'eel bowl to said water bowl within the limits of. a normal infusion following the cessation of current ow through said heating means.

lll. The combination with a vacuum type coffee maker comprising operatively connected codec and water bowls, and electric heating means for said water bowl, of a water bowl support carrying said heating means and having a closure below said water bowl for inhibiting a substantial induced air ilow up through said closure means and said heating means, radiation acceleratingv means associated with said heating means beneath said bowl, and means for providing upon cessation of current iiow an induced cooling air iiow over said radiation accelerating means expediting the cooling of said water bowl.

v15. The combination with a` vacuum type coEee maker comprising operatively connected codec and water bowls, and electric heating means for a vacuum type `coffee said water bowl, of a water bowl support carrying said heating means and having a closure below said water bowl inhibiting a substantial induced cooling air ilow up through said closure and said heating means, radiation accelerating means for said heating means associated with the same beneath said bowl and spaced from said closure along the axis thereof, and means for providing an induced cooling air flow over said radiation, accelerating means upon cessation of current now.

16. The combination with a vacuum type coffee maker comprising operatively connected water and coffee bowls, of heating means for said water bowl, means automatically responsive upon substantial completion of water transfer from said water bowl to said coffee bowl for cutting of! the supply of heating medium to said heating means, and means for eifecting the return of the brewed coffee from said coffee bowl to said water bowl within the limits of a normal infusion.

' 17. The combination with a vacuum type coffee maker comprising operatively connected water and coffee bowls, of heating means for said water bowl, means responsive to a predetermined condition in one of said bowls for automatically cutting off the supply of the heating medium to said heating means, and means for lowering the temperature of said water bowl to effect the return thereto of the brewed coffee in said coffee bowl within the limits of a normal infusion.

18. The combination with a vacuum type coffee maker comprising operatively connected water and coffee bowls, of heating means for said water bowl, means responsive to a predetermined condition in one of said bowls for cutting off the supply of the heating medium to said heating means, and means for thereafter expediting the cooling of said water bowl to expedite the return of the brewed coffee from said coffee bowl to said water bowl.

' 19. The combination with a vacuum type coffee maker comprising operatively .connected water and coifee bowls, of heating means for said water bowl, means responsive'to a predetermined condition in one of said bowls for cutting off the supply of the heating medium to Vsaid heating means, and .means for expediting the cooling of said water bowl to expedite the return of the brewed coffee from said coffee bowl to said water bowl comprising a bowl support having radiation accelerating means and heat dissipating passage means between said bowl support and the atmosphere.

20. The combination with a vacuum type coiee maker comprising operatively connected water and coffee bowls, both exposed to the atmosphere, an electric heating element outside said water bowl for heating the water therein and causing its transfer to said coffee bowl, a circuit for supplying current to said heating element, a switch in the circuit, means automatically responsive upon substantial 'completion of the transfer of water from said water bowl to said coffee bowl for opening said circuit, and means for thereafter expediting the cooling of said water bowl to expedite the automatic return of the brewed coiee thereto.

2l. The combination with a vacuum type coffee maker I comprising operatively connected water and coffee bowls, both exposed to the atmosphere, an electric heating element outside said water bowlifor heating the water therein and causing its transfer to said coifee bowl, a circuit for supplying current to said heating element, a switch 9 in the circuit, means automatically responsive upon substantial completion of the transfer of water from said water bowl to said coffee bowl for opening said circuit, and means for insuring the return of the brewed coffee from said coee bowl to said water bowl within the limits of a normal infusion.

22. 'Ihe combination with a vacuum type coffee maker comprising operatively connected water and coffee bowls, both exposed to the atmosphere, an electric heating element outside said water bowl for heating the water therein and causing its transfer to said coffee bowl, a circuit for supplying current to said heating element, a switch in the circuit, means automatically responsive upon the substantial completion of the water transfer from said water bowl to said coffee bowl for opening said switch.. and cooperating controlling means including a temperature responsive device responsive to the temperature in one of said bowls and likewise opening said circuit.

23. In a coffee maker, a plurality of stationary and movable receptacles for liquid and coffee respectively, means for transferring liquid from the former to the latter to effect infusion therein and movement thereof including operative connections between said receptacles and stationary heating means for heating the stationary receptacle, and automatic controlling means for said heating means associated with the movable receptacle.

24. In a coiee maker, a plurality of receptacles including a stationary receptacle and a movable receptacle, and means for transferring liquid from said stationary receptacle to the other to effect movement thereof and the return of the brewed coifee tov said stationary receptacle including operative connections between saldreceptacles, quick cooling heating means for said stationary receptacle, and automatic controlling means for said heating means controlled by the liquid supplied to said movable receptacle.

25. In a coffee maker, a plurality of receptacles including a stationary heating and dispensing receptacle and a movable brewing receptacle, and means for transferring liquid from the former to the latter and returning the brewed coffee to the former including a, connection therebetween, quick cooling heating means for the former receptacle, and automatic controlling means for Said heating means actuated by said movable, brewing receptacle.

26. In a coffee maker, a base, a plurality of laterally offset heating and infusing receptacles thereon, one movable and the other stationary, means including heating means for one of said receptacles and a stationary connection operatively connected between said receptacles for transferring liquid from one receptacle to infuse coffee in the other and effect movement of one receptacle, and automatically operative means for shutting on' said heating means controlled by said movable receptacle.

27. In a coffee maker, a base, a plurality of heating and infusing receptacles on said base, one movable relative to the other and the lattei` stationary, stationary means for transferring liquid/from one receptacle .to infuse coffee in the movable receptacle and effect movement thereof including stationary heating means on said base for said stationary receptacle and stationary operative connections between said receptacles, and controlling means for said heating means controlled by said movable receptacle.

28. In a coffee maker, a base, a plurality of heating and infusing receptacles on said base, one movable relative to the base and the other stationary .on the latter, means for transferring liquid from the stationary receptacle to th'e other for infusion and then returning the brewed coee to said stationary receptacle including operative connections between said receptacles and stationary heating means on said base for said stationary receptacle, and controlling means for said heating means controlled by said movable receptacle.

29. A. coiee maker comprisingfa plurality of receptacles spaced apart laterally and ha means for transferring heated liquid from one to coilee in another for infusion in the latter and for then transferring the liquid coee from thelatter receptacle to said rst mentioned receptacle upon the completion of a normal infusion, and also having the liquid in said receptacles disposed in glass and both transferring operations visible.

30. In a coffee maker, a. base, a plurality of interconnected spaced glass bowls supported thereon including a stationary heating bowl and a movable infusing bowl and means for reversely transferring liquid therebetween upon heating and cooling of said heating bowl, heating means for said heating bowl in said base, and controlling means for said heating means likewise in said base and controlled by the liquid delivered to said lnfusing bowl.

31. In a coffee maker, a base, a plurality of interconnected spaced glass bowls supported thereon including a stationary heating bowl and a movable infusing bowl and means for reversely transferring liquid therebetween upon heating and cooling of said heating bowl, heating means for said heating bowl in said base, and controlling means for said heating means likewise in said base and controlled by the liquid delivered to said infusing bowl, and supplemental controlling means for said heating means controlled by the liquid in said heating bowl.

32. In a co'ee maker, a base, a plurality of interconnected spaced glass bowls supported thereon including a stationary heating bowl and a movable iniusing bowl and means for reversely transferring liquid therebetween upon heating and cooling of said heating bowl, heating means for said heating bowl in said base, controlling means for said heating means likewise in said base and controlled by theliquid delivered to said infusing bowl, and supply and discharge connections for said stationary bowl likewise in said base.

33. In a coiee maker, a plurality of receptacles, and means for automatically transferring liquid from one to another for infusion in the latter and thereafter automatically returning the liquid including operative connections between said receptacles, electric heating means for one receptacle, a switch controlling the circuit of said heating means, and means including an automatically adjustable switch associated with one of said receptacles for automatically interrupting the current supply to said ilrst mentioned switch.

34. In a coiiee maker, a plurality of receptacles, and means for automatically transferring liquid from one to another and thereafter automatically returning the liquid including heating means, a switch controlling the ow through said heating means, means including an automatically adjustable switch controlling the circuit of said irst mentioned switch, and means for re-establishing acaaeei the circuit connections of said first mentioned switch.

35. In a coiee maker, a plurality of receptacles, means for automatically transferring liquid from one to another and thereafter automatically returning the liquid including heating means, a switch controlling the iow through said heating means, means including. an automatically ad- ,instable switch controlling the circuit of said rst mentioned switch. and means for re-establishing the circuit connections of said first mentioned switch comprising means for manually actuating said automatically operative switch.

86. In a coee maker, a plurality of receptacles, means including heating means for transferring heated liquid from one to the other and returning the liquid when said heating means is shut od, automatic control means for said `heating means, manually operable means for resetting said control means, and control means operable upon the resetting of the same for maintaining the returned liquid hot.

37'. In a coee maker, a plurality of receptacles. means for transferring liquid from one to the other including heating means, means for effecting return of the, liquid including automatic heat controllingmeans, and manually operable controlling means for maintaining the returned liquid hot.

38. In a coee maker, a plurality of receptacles, means for transferring liquid from one to the other including heating means, means for effecting return of the liquid including automatic heat controlling means, and manually operable controlling means for maintaining the returned liquid hot including a manually adjustable member and a manually reset member.

39. In a coffee maker, a plurality of receptacles, means for transferring liquid from one to the other including heating means, means for eecting return of the liquid including automatic heat controlling means, manually operable controlling means for maintaining the returned liquid hot, and automatic means for shutting oil' the heat as the hot liquid is dispensed.

40. In a coiiee maker, a plurality of receptacles, means for transferring liquid from one to the other including heating means, means for effecting return of the liquid including an automatically operated switch controlling said heating means,

manually operable control means for maintaining the returned liquid hot, and automatic means for shutting od the heat when the returned liquid exceeds a predetermined temperature.

el. Inla coffee maker, a plurality of receptacles having operative connections for transferringV liquid from one receptacle when the latter is heated to the other and returning the liquid when the heated receptacle is cooled, electric heating means for said receptacle, a switch controlling the current flow through said heating means, a switch controlling the circuit of said lrst mentioned switch, and means for automatically opening said second switch.

42. In a coffee maken-a plurality of receptacles having operative connections for transferring liquid from one receptacle when the Alatter is heated to the other and returning the liquid when the heated receptacleis cooled, electric heating means for said receptacle, a switch controlling the current iiow through said heating means, a switch controlling the circuit of said rst mentioned switch, and a plurality of means for automatically opening said second switch.

43. In a coee maker, a plurality of receptacli'es 61, Iny a coffee maker, a seat support, a concave bowl seat thereon, heating means inside said seat engaging the inside of the concave surface thereof, a heat retaining member below said` heating means, said seat, heating means and heat retaining member having means uniting the same into a unit and each also presenting an axial aperture therethrough and fluid connection means disposed coaxially with said apertures and connectible' therethrough with a receptacle on said seat.

62. In a coffee maker, a base, a bowl receptacle thereon, a bowl in said receptacle, resilient means supporting said receptacle, and controlling means operable when the weight of liquid in saidl bowl causes a predetermined compression of said resilient means.

63. In a coil'ee maker, a base carrying a vertically adjustable bowl receptacle thereon and having an axial aperture below said receptacle, supporting means carried in said axial aperture, and spring means mounted in said supporting means and engaging and supporting said bowl receptacle.

64. In a coffee maker, a bowl having a closed bottom and an open top, a tube extending into the top of said bowl, and supporting means for said tube carrying a plurality of co-operating discs one supporting the other and the latter engaging and supporting said tube.

65. In a coffee maker, a bowl having a closed bottom and an open top, a tube extending into the top of said bowl, and supporting means for said tube carrying a ring member apertured to establish constant communication with the atmosphere and having an axial aperture larger than said tube and a co-operating split ring seated on said first mentioned ring and gripping said tube closing only the axial aperture therein.

66. In a coffee maker, a support, a receptacle mounted thereon for vertical movement relative to said support, a tube extending into said bowl, and means on said support for supporting said tube in the different vertical positions of said bowl.

67. In a coffee maker, a plurality of laterallyA offset receptacles, sealing means for one of the same carrying a tube, means for establishing communication of the other with the atmosphere and likewise carrying a tube, and means for connecting said tubes.

68. In a coil'ee maker, a plurality of laterally offset receptacles, sealing means for one of the same carrying a tube, means for establishing communication of the other with the atmosphere and likewise carrying a tube, and means for connecting said tubes comprising a separable connection and sealing connections between the ends thereof and said tubes.

69. In a. coffee maker, a plurality of laterally spaced bowls, means on each of the same carrying a tube extending into its bowl, and a connecting member having its opposite ends connected to different tubes. n

70. In a coffee maker, a plurality of laterally spaced bowls, means on each of the same carrying a tube extending into its bowl, a connecting member 'having its opposite ends connected to different tubes above said tube, and seals between the ends of said member and said tubes.

71. In a coffee maker, a stationary receptacle and a vertically movable receptacle, and operative connections for transferring liquid from said stationary receptacle to the other in one position of said movable receptacle and returning it in another position of the latter ihcluding quick cooling stationary heating means for the stationary receptacle, and controlling means for said heating, means actuated by said vertically movable receptacle.

72. In a coffee maker, stationary and, vertically movable receptacles, operative connections for transferring liquid to and from the latter in different positions thereof, electric heating means for the stationary receptacle, and controlling means for said heating means actuated by said vertically movable receptacle and comprising a switch and means for automatically opening the same on vertical movement of said receptacle.

73. In a coffee maker, stationary and vertically movable receptacles, operative connections for transferring liquid to and from the latter in different positions thereof, heating means for the stationary receptacle, and controlling means for said heating means actuated by said vertically movable receptacle and comprising a switch, means for automatically opening the same on vertical movement of said receptacle, and manually operable means for reclosing said switch.

74. In a coffee maker, stationary and veritcally movable receptacles, operative connections for transferring liquid to and from the latter in different positions thereof, heating means for the stationary receptacle, and controlling means for said heating means actuated by said vertically movable receptacle and comprising a pivotally mounted mercury switch, means for automatically tilting the latter to break its circuit upon verK tical movement of said receptacle, and manually operable means 'for tilting said switch to reclose its circuit.

'15. In a coffee maker, a plurality of receptacles operatively connected to transfer liquid back and forth, heating means for one of the same, and controlling means for said heating means comprising a switch, means for automatically opening the latter controlled by the liquid supplied to the other receptacle, means for reestablishing current flow, and manually adjustable means for varying said reestablished flow.

76. In a coffee maker, stationary and vertically movable receptacles operatively connected to transfer liquid back and forth, heating means for one of the same, controlling means for said heating means actuated by said vertically movable receptacle and comprising a switch and means for automatically opening the same on vertical movement of said movable receptacle, and automatic controlling means associated with the stationary receptacle for likewise opening said switch.

77. In a coee maker, stationary and vertically movable receptacles operatively connected to transfer liquid back and forth, heating means for one of the same, controlling means for said heating means actuated by said vertically movable receptacle and comprising a switch and means for automatically opening the same on vertical movement of said movable receptacle, automatic controlling means associated with said stationary receptacle for likewise opening said switch, and manually controlled means for resetting said switch.

'18. In a coffee maker, electric heating means,

Y automatically and manually adjustable controlhaving operative connections for transferring liquid from one receptacle when the latter is heated to the other and returning the liquid when the heated receptacle is cooled electric heating means for said receptacle, a switch controlling the current ilow through said heating means, a switch controlling the circuit of'said first mentioned switch, a plurality of means for automatically opening said second switch, and manually operable closing means for said second switch.

44. In a coilee maker, a liquid receiving and coil'ee dispensing receptacle, a co-operating ground coee containing receptacle having a connection with said first receptacle, heating means for the first mentioned receptacle, and controlling means for said heating means including manually operable controlling means and a plurality of automatically operable controlling means, one of the latter controlling the coffee making operation and the other controlled by the temperature of the heating means.

45. In a coiee maker, a liquid receiving and coffee dispensing receptacle, a co-operating ground coiee containing receptacle having a connection with said rst receptacle, heating means for the rst mentioned receptacle, and controlling means for said heating means including manually operable controlling means and a plurality of automatically operable controlling means, one of the latter being associated with each receptacleA 46. In a coiee maker, mechanism for making coiee comprising a plurality of receptacles and means for delivering the water from one receptacle to a ground'colee containing receptacle and returning the brewed coffee to said rst receptacle to be dispensed, including means for maintaining the coiee in the latter receptacle heated while being dispensed, and means for automatically cutting ofi the heat when the liquid level drops below a predetermined point.

47. In a coiee maker, mechanism for making coee comprising a plurality of receptacles and means for delivering the water from one receptacle to a ground coffee containing receptacle and returning the brewed coiee to said first receptacle to be dispensed, including means for maintaining the coffee in the latter receptacle heated while being dispensed, and means for automatically cutting o the heat when the temperature rises above a predetermined point.

48. In a coiee maker, a base, a receptacle thereon, electric heating means thereon beneath said receptacle, and water supply and coiee dispensing connections for said receptacle having separate control means and a common coaxial connection with said receptacle th .'ough said heating means.

49. In a coffee maker, a base, a receptacle thereon, electric heating means thereon beneath said receptacle, and water supply and coffee dispensing connections for said receptacle having separate control means,I said supply and dispensing connection having a common coaxial connection with said receptacle through said heating means and said receptacle also having an axial portion extending through said heating means into said connection.

50. In a coffee maker, a base having receptacle seat carrying means thereon, a receptacle seat removably carried on said seat carrying means, a heating unit beneath said seat removable bodily with said seat, and means for supplying liquid through said seat and heating unit into a receptacle on said s^:.t.

' supply and discharge connection carried 51. In a coiee maker, a base having receptacle seat carrying means thereon, a receptacle seat carried on said means, a heating unit beneath said seat, said seat and said heating unit each having an axial aperture therein for receiving a projecting axial portion and a receptacle having an axial supply connection extending through said apertures.

52. In a coiee maker, a base havin'g receptacle seat carrying means thereon, receptacle seat carried on said means, a heating unit beneath said seat, said seat and said unit each having an axial aperture therein, and a liquid by said base coaxially with said aperture.

53. In a coilee maker, a base having receptacle seat carrying means, a receptacle seat carried on said means, a heating unit beneath said seat, said seat and unit each having an axial aperture therein, a bowl on said seat, an` axial supply connection therefor extending through said apertures, and means for connecting said bowl to said connection seating said bowl on said seat.

54. In a coiee maker, a receptacle having a bottom axial aperture, supply and discharge connections connected thereto, electric heating means surrounding said aperture, and terminal connections for saidheating means likewise disposed around said aperture.

55. In a coiee maker, a receptacle having a bottom aperture and an open top, valved supply connections to said aperture, means for closing said top having an axial aperture therein, and a tube sealed in said axial aperture and extending into said receptacle.

56. In'a coiee maker, a receptacle having. an

open top, and means for closing said top comprising a plurality of relatively adjustable clamping members carried by said top and carrying sealing means over the latter, and a tube extending axially through said sealing means into said receptacle.

57. In a coiee maker, a bowl having an open top, means for closing said top having an axial aperture therein, a tube sealed in said aperture and extending into said bowl, and valve means carried by said closing means and controlling the pressure in said bowl.

58. In a coiee maker, a bowl having an open top, means for closing said top having an axial aperture therein, a tube sealed in said aperture and extending into said bowl, and valve means carried by said closing means, said closing means comprising a plurality of co-operating sealing members and having both the seal for saidv tube and said valve carried by the same member.

59. In a coffee maker, a seat support, a concave bowl seat thereon, heating means inside said seat engaging the inside of the concave surface thereof, a heat retaining member spaced from said heating means below the same, and .a receptacle on said seat having inlet means extending axially through said elements on said support.

60. In a coiee maker, a seat support, a concave bowl seat thereon, heating means Vinside said seat engaging the inside of the concave surface thereof, a heat retaining member spaced from said heating means below the same, said seat, heating means and heat retaining member having axial connecting means uniting the same into a unit, and a receptacle on said seat having a uid connection extending through said connecting means.

renderthe manually adjustable means inoperative, and means for reestablishing current flow and rendering said manually adjustable means operative. Y

79. In a coffee maker, electric heating means, automatically and manually adjustable controlling means connected in the circuit thereof and comprising a plurality of switches, both controlling the current ow to said heating means and one manually adjustable and the other automatically adjustable to discontinue heating upon completion of the coffee making operation and render the manually adjustable means inoperative, means for reestablishing current flow and rendering said manually adjustable means operative, and indicating means operative whenever current iiows to said heating means.

80. In a coffee maker, electric heating means,

automatically and manually adjustable controlling means connected in the circuit thereof and comprising a plurality of switches, both controlling the current flow to said heating means and one manually adjustable and the other automatically adjustable to discontinue heating upon completion of the coiee making operation and render the manually adjustable means inoperative, and means for reestablishing current ow and rendering said manually 'adjustable means operative, said manually adjustable means also being adjustable to Vary the heating effect of said heating means.

81. In combination, a heating unit, a pressure plate therefor, a heat retaining member enclosing and spaced from said pressure plate, and terminal connections for said heating unit carried by said pressure plate projecting through and insulated from said heat retaining member.

82. In combination, a threaded member slotted to receive a conductor, means threaded on said member for clamping said conductor in position thereon, and means threaded on said last mentioned means for connecting a line connection thereto.

83. In combination, a heating unit comprising a plurality of series of series connected heating elements, terminal connections connected to the end elements of each series of elements providing a. plurality of independent lineconnections for each series of elements, and switch mechanism connected to said terminals for selectively connecting said elements in series or all or part thereof in parallel.

84. In combination, a heating unit comprising a plurality of series of series connected heating elements, and terminal connections connected to the end elements of each series of elements, said elements having a common pressure plate carrying said terminals and also a common heat retaining plate spaced from and enclosing said pressure plate and having apertures through which said terminals extend.

FRANK E. WOLCO'I'I. 

